i added to my other O2 thread, but no responses yet, so I'll try a new one.

I believe it is the P0135, pre-cat O2 DTC. My Aeroforce is reading roughly between 40-850 Mv on the sensor at idle, but I was curious what the range would be for a properly operating 02?

Thanks

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1998 Olds LSS/L67, 92K miles, Intense FWI, SSAC headers, 3.2 MPS, cat delete, 180 stat, AL 103's, HPT.
1996 Olds Eighty Eight LS/L36, 146K miles, mostly stock
1997 Olds LSS/L36, 95K miles, raided for dent free parts and sold
1989 Bonneville LE Gem (sold)
1987 Bonneville LE (retired)

From what I understand, it's just supposed to keep switching between the numbers really quickly. If it's slow to switch, or is hanging out near a certain number, that's when it's showing as Lazy. Mine when I watch it usually jumps from .2v-.9v back and forth with some variations in between, but I'm sure someone else can give you a more expert answer haha.

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Joseph

Current: 2013 Infiniti G37 Journey
1999 Infiniti G20T - Sold
1999 Buick Lesabre - Race Couch - gone but not forgotten

You need a data logger to graph the results. When working properly at cruise there will be a clearly defined pattern on the graph as it switches back and forth, kinda like a sine wave on caffeine. As the sensor ages, it responds slower. Other issues with the sensor can result in pattern-less data. It is dependant on the resolution of the scanner (how many data points it can take); with an oscilloscope you can get an amazing graph compared to an OBD scanner.

I think the range is between 0v and .99v, .2v being lean and .8v being rich. With the throttle pegged it should flat line at it's max voltage

Borrowed from Google:

_________________
Boost addict


The Fleet:
'93 SSEi - Twincharged + manual Build thread
'97 Camaro - Top swap
'05 STS - V8, AWD, her DD
'92 Trofeo - Fair weather DD
'99 Montana - top swap 3800
'04 Sierra 2500HD - LLY Duramax

Current project:
Something cool, trust me.

Upcoming projects:
'92 Bonneville SSE
'87 LeSabre T-type
'67 LeSabre

Gone to greener pastures:
'84 Sierra Classic - Twin turbo 3800
'97 LeSabre - Top swap

RIP:
'86 LeSabre - pictures
'93 SE - L67

Thanks, that sure helps me understand what's going on now.

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1998 Olds LSS/L67, 92K miles, Intense FWI, SSAC headers, 3.2 MPS, cat delete, 180 stat, AL 103's, HPT.
1996 Olds Eighty Eight LS/L36, 146K miles, mostly stock
1997 Olds LSS/L36, 95K miles, raided for dent free parts and sold
1989 Bonneville LE Gem (sold)
1987 Bonneville LE (retired)

Am I correct in thinking that in the first graph, the O2 is cycling approx every half second? Or is the bottom of the chart showing something else, .5, 1.0, 1.5, 2.0 etc?

_________________


1998 Olds LSS/L67, 92K miles, Intense FWI, SSAC headers, 3.2 MPS, cat delete, 180 stat, AL 103's, HPT.
1996 Olds Eighty Eight LS/L36, 146K miles, mostly stock
1997 Olds LSS/L36, 95K miles, raided for dent free parts and sold
1989 Bonneville LE Gem (sold)
1987 Bonneville LE (retired)

Hard to tell but i think I can make out an "s" under the 0.0 so it probably is seconds

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-Austin-
1988 LE, Intercooled L67 loading......

2000 SSEi R.I.P. Dead now :( INTENSE FWI, polished LIM, P&P supercharger, custom radiator, standalone trans cooler, trans-go shift kit (donating to the 88)

2002 2500HD Silverado with the 8.1 Vortec and Alison tranny. Likes to eat GT Mustangs and lots of tires, and all while stock!